Yew and juniper pollen season in selected cities of Poland in 2020

The study compares the yew and juniper pollen seasons in Bialystok, Bydgoszcz, Cracow, Lublin, Piotrkow Trybunalski, Sosnowiec, Szczecin, Warsaw, and Wroclaw in 2020. The investigations were conducted using the volumetric method. The yew and juniper season started in all measurement sites between February 2^nd (Szczecin) and March 2^nd (Lublin). The peak values of seasonal pollen count occurred between February 23^rd (in Szczecin) and March 28^th. The highest daily pollen count was recorded in Lublin (867 grains/m³) and the lowest pollen count in Bialystok (45 grains/m3). The highest annual totals were recorded in Lublin and Wroclaw. Most days, with a concentration equal to or above 50 grains/m³, causing symptoms in allergic patients were recorded in Lublin and Warsaw.